/* roulang page: index */
:root {
            --navy: #0f1b33;
            --gold: #c9973b;
            --bright: #e8b84b;
            --light-bg: #f8f6f1;
            --deep-bg: #091220;
            --text-dark: #1a1a2e;
            --text-muted: #6b7280;
            --border-light: rgba(201, 151, 59, 0.15);
            --shadow-card: 0 8px 32px rgba(15, 27, 51, 0.08);
            --shadow-hover: 0 16px 48px rgba(15, 27, 51, 0.14);
            --radius-card: 1rem;
            --radius-btn: 0.75rem;
            --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }

        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
        }

        body {
            font-family: 'PingFang SC', 'Microsoft YaHei', system-ui, -apple-system, sans-serif;
            background-color: #ffffff;
            color: var(--text-dark);
            line-height: 1.6;
            -webkit-font-smoothing: antialiased;
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
        }

        a {
            color: inherit;
            text-decoration: none;
            transition: var(--transition);
        }

        button,
        input,
        textarea {
            font-family: inherit;
            font-size: inherit;
            outline: none;
            border: none;
        }

        button {
            cursor: pointer;
            background: none;
        }

        ul,
        ol {
            list-style: none;
        }

        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 1.25rem;
        }

        @media (min-width: 768px) {
            .container {
                padding: 0 2rem;
            }
        }

        @media (min-width: 1024px) {
            .container {
                padding: 0 2.5rem;
            }
        }

        /* ===== 顶部导航 ===== */
        .header-main {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            background: rgba(255, 255, 255, 0.95);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid rgba(201, 151, 59, 0.12);
            transition: var(--transition);
            height: 64px;
            display: flex;
            align-items: center;
        }

        .header-main.scrolled {
            box-shadow: 0 4px 30px rgba(15, 27, 51, 0.06);
        }

        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            width: 100%;
        }

        .logo-link {
            display: flex;
            align-items: center;
            gap: 0.5rem;
            font-weight: 700;
            font-size: 1.25rem;
            color: var(--navy);
            letter-spacing: 0.5px;
        }

        .logo-link .logo-icon {
            width: 36px;
            height: 36px;
            background: linear-gradient(135deg, var(--navy), #1e3a5f);
            border-radius: 10px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--gold);
            font-size: 1.1rem;
            font-weight: 800;
            box-shadow: 0 2px 12px rgba(201, 151, 59, 0.2);
        }

        .nav-desktop {
            display: flex;
            align-items: center;
            gap: 2rem;
        }

        .nav-desktop a {
            font-size: 0.95rem;
            font-weight: 500;
            color: var(--text-muted);
            padding: 0.25rem 0;
            position: relative;
            transition: var(--transition);
        }

        .nav-desktop a::after {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 0;
            width: 0;
            height: 2px;
            background: var(--gold);
            border-radius: 2px;
            transition: var(--transition);
        }

        .nav-desktop a:hover {
            color: var(--navy);
        }

        .nav-desktop a:hover::after {
            width: 100%;
        }

        .nav-desktop a.active {
            color: var(--navy);
            font-weight: 600;
        }

        .nav-desktop a.active::after {
            width: 100%;
        }

        .nav-cta {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            padding: 0.5rem 1.25rem;
            background: linear-gradient(135deg, var(--gold), var(--bright));
            color: #fff !important;
            border-radius: var(--radius-btn);
            font-weight: 600;
            font-size: 0.9rem;
            box-shadow: 0 4px 16px rgba(201, 151, 59, 0.3);
            transition: var(--transition);
        }

        .nav-cta::after {
            display: none !important;
        }

        .nav-cta:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 28px rgba(201, 151, 59, 0.4);
            color: #fff !important;
        }

        /* ===== 移动端底部Tab ===== */
        .bottom-tab-bar {
            position: fixed;
            bottom: 0;
            left: 0;
            right: 0;
            z-index: 1001;
            background: rgba(255, 255, 255, 0.97);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-top: 1px solid rgba(201, 151, 59, 0.12);
            display: flex;
            align-items: center;
            justify-content: space-around;
            padding: 0.4rem 0.5rem;
            padding-bottom: calc(0.4rem + env(safe-area-inset-bottom, 0));
            box-shadow: 0 -4px 20px rgba(15, 27, 51, 0.05);
            height: 60px;
        }

        .bottom-tab-item {
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            gap: 0.15rem;
            font-size: 0.65rem;
            color: var(--text-muted);
            transition: var(--transition);
            padding: 0.25rem 0.75rem;
            border-radius: 0.5rem;
            flex: 1;
            max-width: 100px;
        }

        .bottom-tab-item i {
            font-size: 1.2rem;
            transition: var(--transition);
        }

        .bottom-tab-item span {
            font-weight: 500;
            letter-spacing: 0.3px;
        }

        .bottom-tab-item.active {
            color: var(--gold);
        }

        .bottom-tab-item.active i {
            transform: scale(1.05);
        }

        .bottom-tab-item:hover {
            color: var(--navy);
        }

        .bottom-tab-divider {
            width: 1px;
            height: 28px;
            background: rgba(201, 151, 59, 0.1);
        }

        /* ===== Hero ===== */
        .hero-section {
            padding-top: 64px;
            min-height: 90vh;
            display: flex;
            align-items: center;
            position: relative;
            background: linear-gradient(160deg, #f8f6f1 0%, #efe9dc 50%, #e8e0d0 100%);
            overflow: hidden;
        }

        .hero-section::before {
            content: '';
            position: absolute;
            top: -30%;
            right: -20%;
            width: 600px;
            height: 600px;
            background: radial-gradient(circle, rgba(201, 151, 59, 0.08) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }

        .hero-section::after {
            content: '';
            position: absolute;
            bottom: -20%;
            left: -10%;
            width: 400px;
            height: 400px;
            background: radial-gradient(circle, rgba(15, 27, 51, 0.04) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }

        .hero-content {
            position: relative;
            z-index: 2;
            padding: 3rem 0 4rem;
        }

        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 0.4rem;
            padding: 0.35rem 1rem;
            background: rgba(201, 151, 59, 0.12);
            border: 1px solid rgba(201, 151, 59, 0.2);
            border-radius: 100px;
            font-size: 0.8rem;
            color: var(--gold);
            font-weight: 600;
            letter-spacing: 0.5px;
            margin-bottom: 1.5rem;
        }

        .hero-title {
            font-size: 2.5rem;
            font-weight: 800;
            line-height: 1.2;
            color: var(--navy);
            letter-spacing: -0.5px;
        }

        .hero-title .highlight {
            color: var(--gold);
            position: relative;
        }

        .hero-title .highlight::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 0;
            right: 0;
            height: 6px;
            background: rgba(201, 151, 59, 0.2);
            border-radius: 3px;
            z-index: -1;
        }

        .hero-desc {
            font-size: 1.05rem;
            color: var(--text-muted);
            max-width: 540px;
            margin-top: 1.25rem;
            line-height: 1.7;
        }

        .hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 1rem;
            margin-top: 2rem;
        }

        .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 0.6rem;
            padding: 0.75rem 2rem;
            background: linear-gradient(135deg, var(--gold), var(--bright));
            color: #fff;
            font-weight: 600;
            font-size: 0.95rem;
            border-radius: var(--radius-btn);
            box-shadow: 0 4px 20px rgba(201, 151, 59, 0.3);
            transition: var(--transition);
            border: none;
        }

        .btn-primary:hover {
            transform: translateY(-3px);
            box-shadow: 0 10px 36px rgba(201, 151, 59, 0.4);
            color: #fff;
        }

        .btn-secondary {
            display: inline-flex;
            align-items: center;
            gap: 0.6rem;
            padding: 0.75rem 2rem;
            background: transparent;
            color: var(--navy);
            font-weight: 600;
            font-size: 0.95rem;
            border-radius: var(--radius-btn);
            border: 2px solid rgba(201, 151, 59, 0.3);
            transition: var(--transition);
        }

        .btn-secondary:hover {
            border-color: var(--gold);
            background: rgba(201, 151, 59, 0.05);
            transform: translateY(-2px);
        }

        .hero-stats {
            display: flex;
            flex-wrap: wrap;
            gap: 2.5rem;
            margin-top: 3rem;
            padding-top: 2rem;
            border-top: 1px solid rgba(201, 151, 59, 0.12);
        }

        .hero-stat-item {
            text-align: left;
        }

        .hero-stat-number {
            font-size: 1.75rem;
            font-weight: 800;
            color: var(--navy);
            letter-spacing: -0.5px;
        }

        .hero-stat-label {
            font-size: 0.85rem;
            color: var(--text-muted);
            margin-top: 0.15rem;
        }

        /* ===== 板块通用 ===== */
        .section-pad {
            padding: 4.5rem 0;
        }

        .section-pad-sm {
            padding: 3rem 0;
        }

        .section-title {
            font-size: 2rem;
            font-weight: 700;
            color: var(--navy);
            line-height: 1.25;
            letter-spacing: -0.3px;
        }

        .section-subtitle {
            font-size: 1rem;
            color: var(--text-muted);
            max-width: 600px;
            margin-top: 0.75rem;
            line-height: 1.7;
        }

        .section-header {
            text-align: center;
            margin-bottom: 3rem;
        }

        .section-header .section-subtitle {
            margin-left: auto;
            margin-right: auto;
        }

        .section-tag {
            display: inline-block;
            padding: 0.25rem 1rem;
            background: rgba(201, 151, 59, 0.1);
            border-radius: 100px;
            font-size: 0.8rem;
            color: var(--gold);
            font-weight: 600;
            margin-bottom: 0.75rem;
            letter-spacing: 0.5px;
        }

        /* ===== 平台简介 ===== */
        .intro-grid {
            display: grid;
            grid-template-columns: 1fr;
            gap: 2rem;
            align-items: center;
        }

        .intro-image-wrap {
            position: relative;
            border-radius: var(--radius-card);
            overflow: hidden;
            box-shadow: var(--shadow-card);
            background: linear-gradient(135deg, var(--navy), #1e3a5f);
            aspect-ratio: 16 / 10;
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
        }

        .intro-image-wrap .placeholder-icon {
            font-size: 4rem;
            opacity: 0.15;
            position: absolute;
        }

        .intro-image-wrap .overlay-text {
            position: relative;
            z-index: 2;
            text-align: center;
            padding: 2rem;
        }

        .intro-image-wrap .overlay-text h3 {
            font-size: 1.5rem;
            font-weight: 700;
            color: var(--gold);
        }

        .intro-image-wrap .overlay-text p {
            color: rgba(255, 255, 255, 0.7);
            margin-top: 0.5rem;
            font-size: 0.95rem;
        }

        .intro-features {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 1rem;
            margin-top: 1.5rem;
        }

        .intro-feature-item {
            display: flex;
            align-items: flex-start;
            gap: 0.75rem;
            padding: 1rem 1.25rem;
            background: var(--light-bg);
            border-radius: var(--radius-card);
            transition: var(--transition);
        }

        .intro-feature-item:hover {
            background: #fff;
            box-shadow: var(--shadow-card);
            transform: translateY(-2px);
        }

        .intro-feature-item .icon-box {
            width: 40px;
            height: 40px;
            min-width: 40px;
            border-radius: 10px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.1rem;
            color: var(--gold);
            background: rgba(201, 151, 59, 0.1);
        }

        .intro-feature-item h4 {
            font-size: 0.95rem;
            font-weight: 600;
            color: var(--navy);
        }

        .intro-feature-item p {
            font-size: 0.85rem;
            color: var(--text-muted);
            margin-top: 0.15rem;
        }

        /* ===== 分类入口卡片 ===== */
        .category-card {
            background: #fff;
            border-radius: var(--radius-card);
            padding: 2rem 1.5rem;
            box-shadow: var(--shadow-card);
            border: 1px solid rgba(201, 151, 59, 0.08);
            transition: var(--transition);
            text-align: center;
            position: relative;
            overflow: hidden;
        }

        .category-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 4px;
            background: linear-gradient(90deg, var(--gold), var(--bright));
            opacity: 0;
            transition: var(--transition);
        }

        .category-card:hover::before {
            opacity: 1;
        }

        .category-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-hover);
            border-color: rgba(201, 151, 59, 0.2);
        }

        .category-card .icon-wrap {
            width: 60px;
            height: 60px;
            margin: 0 auto 1rem;
            border-radius: 16px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.5rem;
            color: var(--gold);
            background: rgba(201, 151, 59, 0.08);
            transition: var(--transition);
        }

        .category-card:hover .icon-wrap {
            background: rgba(201, 151, 59, 0.15);
            transform: scale(1.05);
        }

        .category-card h3 {
            font-size: 1.1rem;
            font-weight: 700;
            color: var(--navy);
        }

        .category-card p {
            font-size: 0.9rem;
            color: var(--text-muted);
            margin-top: 0.5rem;
            line-height: 1.6;
        }

        .category-card .card-link {
            display: inline-flex;
            align-items: center;
            gap: 0.4rem;
            margin-top: 1.25rem;
            font-size: 0.9rem;
            font-weight: 600;
            color: var(--gold);
            transition: var(--transition);
        }

        .category-card .card-link i {
            transition: var(--transition);
        }

        .category-card:hover .card-link i {
            transform: translateX(4px);
        }

        /* ===== 数据统计 ===== */
        .stats-section {
            background: linear-gradient(135deg, var(--navy), #091220);
            color: #fff;
        }

        .stats-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 1.5rem;
        }

        .stat-card {
            text-align: center;
            padding: 2rem 1rem;
            background: rgba(255, 255, 255, 0.04);
            border-radius: var(--radius-card);
            border: 1px solid rgba(255, 255, 255, 0.06);
            backdrop-filter: blur(4px);
            transition: var(--transition);
        }

        .stat-card:hover {
            background: rgba(255, 255, 255, 0.07);
            transform: translateY(-3px);
        }

        .stat-card .stat-number {
            font-size: 2.2rem;
            font-weight: 800;
            color: var(--bright);
            letter-spacing: -0.5px;
        }

        .stat-card .stat-label {
            font-size: 0.9rem;
            color: rgba(255, 255, 255, 0.6);
            margin-top: 0.25rem;
        }

        .stat-card .stat-icon {
            font-size: 1.6rem;
            color: rgba(201, 151, 59, 0.3);
            margin-bottom: 0.75rem;
        }

        /* ===== 最新资讯 ===== */
        .news-card {
            background: #fff;
            border-radius: var(--radius-card);
            overflow: hidden;
            box-shadow: var(--shadow-card);
            border: 1px solid rgba(201, 151, 59, 0.06);
            transition: var(--transition);
            display: flex;
            flex-direction: column;
        }

        .news-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-hover);
            border-color: rgba(201, 151, 59, 0.12);
        }

        .news-card .news-img {
            width: 100%;
            aspect-ratio: 16 / 9;
            background: linear-gradient(135deg, #e8e0d0, #d4c9b8);
            display: flex;
            align-items: center;
            justify-content: center;
            color: rgba(15, 27, 51, 0.2);
            font-size: 2.5rem;
            position: relative;
        }

        .news-card .news-img .category-tag {
            position: absolute;
            top: 0.75rem;
            left: 0.75rem;
            padding: 0.2rem 0.7rem;
            background: rgba(15, 27, 51, 0.7);
            backdrop-filter: blur(8px);
            border-radius: 6px;
            font-size: 0.7rem;
            color: #fff;
            font-weight: 600;
        }

        .news-card .news-body {
            padding: 1.25rem 1.25rem 1.5rem;
            flex: 1;
            display: flex;
            flex-direction: column;
        }

        .news-card .news-title {
            font-size: 1rem;
            font-weight: 700;
            color: var(--navy);
            line-height: 1.4;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .news-card .news-excerpt {
            font-size: 0.85rem;
            color: var(--text-muted);
            margin-top: 0.5rem;
            line-height: 1.6;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
            flex: 1;
        }

        .news-card .news-meta {
            display: flex;
            align-items: center;
            justify-content: space-between;
            margin-top: 1rem;
            padding-top: 0.75rem;
            border-top: 1px solid rgba(201, 151, 59, 0.06);
            font-size: 0.78rem;
            color: var(--text-muted);
        }

        .news-card .news-meta .date {
            display: flex;
            align-items: center;
            gap: 0.35rem;
        }

        .news-card .news-meta .read-more {
            color: var(--gold);
            font-weight: 600;
            display: flex;
            align-items: center;
            gap: 0.3rem;
            transition: var(--transition);
        }

        .news-card .news-meta .read-more:hover {
            gap: 0.6rem;
        }

        .news-empty {
            grid-column: 1 / -1;
            text-align: center;
            padding: 3rem 1rem;
            background: var(--light-bg);
            border-radius: var(--radius-card);
            color: var(--text-muted);
            font-size: 0.95rem;
        }

        /* ===== 使用流程 ===== */
        .flow-section {
            background: var(--light-bg);
        }

        .flow-grid {
            display: grid;
            grid-template-columns: 1fr;
            gap: 1.5rem;
            position: relative;
        }

        .flow-step {
            display: flex;
            align-items: flex-start;
            gap: 1.25rem;
            background: #fff;
            padding: 1.5rem;
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            border: 1px solid rgba(201, 151, 59, 0.06);
            transition: var(--transition);
            position: relative;
        }

        .flow-step:hover {
            transform: translateX(4px);
            box-shadow: var(--shadow-hover);
        }

        .flow-step .step-num {
            width: 44px;
            height: 44px;
            min-width: 44px;
            border-radius: 12px;
            background: linear-gradient(135deg, var(--gold), var(--bright));
            color: #fff;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 800;
            font-size: 1.1rem;
            box-shadow: 0 4px 12px rgba(201, 151, 59, 0.25);
        }

        .flow-step .step-content h4 {
            font-size: 1rem;
            font-weight: 700;
            color: var(--navy);
        }

        .flow-step .step-content p {
            font-size: 0.88rem;
            color: var(--text-muted);
            margin-top: 0.25rem;
            line-height: 1.6;
        }

        /* ===== FAQ ===== */
        .faq-item {
            border-bottom: 1px solid rgba(201, 151, 59, 0.1);
            padding: 1.25rem 0;
            transition: var(--transition);
        }

        .faq-item:first-child {
            padding-top: 0;
        }

        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            cursor: pointer;
            font-size: 1rem;
            font-weight: 600;
            color: var(--navy);
            gap: 1rem;
        }

        .faq-question i {
            color: var(--gold);
            font-size: 0.9rem;
            transition: var(--transition);
            min-width: 20px;
            text-align: center;
        }

        .faq-question.open i {
            transform: rotate(180deg);
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s ease, padding 0.3s ease;
            padding-top: 0;
        }

        .faq-answer.open {
            max-height: 300px;
            padding-top: 0.75rem;
        }

        .faq-answer p {
            font-size: 0.9rem;
            color: var(--text-muted);
            line-height: 1.7;
        }

        /* ===== CTA ===== */
        .cta-section {
            background: linear-gradient(160deg, var(--navy), #091220);
            color: #fff;
            text-align: center;
        }

        .cta-title {
            font-size: 2rem;
            font-weight: 700;
            color: #fff;
        }

        .cta-desc {
            font-size: 1rem;
            color: rgba(255, 255, 255, 0.65);
            max-width: 560px;
            margin: 0.75rem auto 0;
            line-height: 1.7;
        }

        .cta-actions {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 1rem;
            margin-top: 2rem;
        }

        .btn-cta-primary {
            display: inline-flex;
            align-items: center;
            gap: 0.6rem;
            padding: 0.8rem 2.2rem;
            background: linear-gradient(135deg, var(--gold), var(--bright));
            color: #fff;
            font-weight: 700;
            font-size: 1rem;
            border-radius: var(--radius-btn);
            box-shadow: 0 4px 24px rgba(201, 151, 59, 0.35);
            transition: var(--transition);
        }

        .btn-cta-primary:hover {
            transform: translateY(-3px);
            box-shadow: 0 12px 40px rgba(201, 151, 59, 0.45);
            color: #fff;
        }

        .btn-cta-secondary {
            display: inline-flex;
            align-items: center;
            gap: 0.6rem;
            padding: 0.8rem 2.2rem;
            background: transparent;
            color: #fff;
            font-weight: 600;
            font-size: 1rem;
            border-radius: var(--radius-btn);
            border: 2px solid rgba(255, 255, 255, 0.15);
            transition: var(--transition);
        }

        .btn-cta-secondary:hover {
            border-color: var(--gold);
            background: rgba(201, 151, 59, 0.08);
            color: #fff;
            transform: translateY(-2px);
        }

        /* ===== 页脚 ===== */
        .footer-main {
            background: #0a0f1a;
            color: rgba(255, 255, 255, 0.7);
            padding: 3rem 0 6.5rem;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1fr;
            gap: 2rem;
        }

        .footer-brand .logo-link {
            color: #fff;
        }

        .footer-brand .logo-link .logo-icon {
            background: linear-gradient(135deg, var(--gold), var(--bright));
            color: var(--navy);
        }

        .footer-brand p {
            font-size: 0.88rem;
            color: rgba(255, 255, 255, 0.5);
            margin-top: 0.75rem;
            max-width: 320px;
            line-height: 1.7;
        }

        .footer-links h4 {
            font-size: 0.95rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 1rem;
        }

        .footer-links ul li {
            margin-bottom: 0.5rem;
        }

        .footer-links ul li a {
            font-size: 0.88rem;
            color: rgba(255, 255, 255, 0.55);
            transition: var(--transition);
        }

        .footer-links ul li a:hover {
            color: var(--gold);
            padding-left: 4px;
        }

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            padding-top: 1.5rem;
            margin-top: 2rem;
            display: flex;
            flex-direction: column;
            gap: 0.5rem;
            font-size: 0.8rem;
            color: rgba(255, 255, 255, 0.35);
        }

        .footer-bottom a {
            color: rgba(255, 255, 255, 0.35);
        }

        .footer-bottom a:hover {
            color: var(--gold);
        }

        /* ===== 响应式 ===== */
        @media (min-width: 640px) {
            .hero-title {
                font-size: 3rem;
            }
            .stats-grid {
                grid-template-columns: repeat(4, 1fr);
            }
            .flow-grid {
                grid-template-columns: 1fr 1fr;
            }
            .footer-grid {
                grid-template-columns: 2fr 1fr 1fr;
            }
            .intro-features {
                grid-template-columns: 1fr 1fr;
            }
            .footer-main {
                padding-bottom: 2.5rem;
            }
        }

        @media (min-width: 768px) {
            .hero-title {
                font-size: 3.5rem;
            }
            .intro-grid {
                grid-template-columns: 1fr 1fr;
            }
            .section-pad {
                padding: 6rem 0;
            }
            .section-title {
                font-size: 2.25rem;
            }
            .bottom-tab-bar {
                display: none !important;
            }
            .footer-main {
                padding-bottom: 2.5rem;
            }
            .hero-section {
                min-height: 85vh;
            }
            .news-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }

        @media (min-width: 1024px) {
            .hero-title {
                font-size: 4rem;
            }
            .news-grid {
                grid-template-columns: repeat(3, 1fr);
            }
            .flow-grid {
                grid-template-columns: repeat(4, 1fr);
            }
            .section-pad {
                padding: 7rem 0;
            }
            .hero-stats {
                gap: 3.5rem;
            }
        }

        @media (max-width: 767px) {
            .header-main {
                height: 56px;
            }
            .hero-section {
                padding-top: 56px;
                min-height: auto;
            }
            .hero-content {
                padding: 2.5rem 0 3rem;
            }
            .hero-title {
                font-size: 2rem;
            }
            .hero-desc {
                font-size: 0.95rem;
            }
            .hero-stats {
                gap: 1.5rem;
            }
            .hero-stat-number {
                font-size: 1.4rem;
            }
            .nav-desktop {
                display: none !important;
            }
            .section-title {
                font-size: 1.6rem;
            }
            .section-pad {
                padding: 3rem 0;
            }
            .intro-grid {
                gap: 1.5rem;
            }
            .intro-features {
                grid-template-columns: 1fr;
            }
            .stats-grid {
                grid-template-columns: 1fr 1fr;
                gap: 0.75rem;
            }
            .stat-card {
                padding: 1.25rem 0.75rem;
            }
            .stat-card .stat-number {
                font-size: 1.6rem;
            }
            .news-grid {
                grid-template-columns: 1fr;
            }
            .flow-step {
                padding: 1.25rem;
            }
            .cta-title {
                font-size: 1.5rem;
            }
            .footer-main {
                padding-bottom: 5.5rem;
            }
            .footer-grid {
                gap: 1.5rem;
            }
            .hero-actions {
                flex-direction: column;
            }
            .hero-actions .btn-primary,
            .hero-actions .btn-secondary {
                width: 100%;
                justify-content: center;
            }
            .cta-actions {
                flex-direction: column;
                align-items: center;
            }
            .cta-actions .btn-cta-primary,
            .cta-actions .btn-cta-secondary {
                width: 100%;
                max-width: 320px;
                justify-content: center;
            }
        }

        @media (max-width: 380px) {
            .hero-title {
                font-size: 1.7rem;
            }
            .hero-stat-number {
                font-size: 1.2rem;
            }
            .stat-card .stat-number {
                font-size: 1.3rem;
            }
            .section-title {
                font-size: 1.35rem;
            }
            .bottom-tab-item {
                font-size: 0.6rem;
                padding: 0.2rem 0.4rem;
            }
            .bottom-tab-item i {
                font-size: 1rem;
            }
        }

        /* ===== 工具类 ===== */
        .text-gold {
            color: var(--gold);
        }
        .bg-gold-light {
            background: rgba(201, 151, 59, 0.06);
        }
        .border-gold-light {
            border-color: rgba(201, 151, 59, 0.12);
        }

        .fade-in-up {
            opacity: 0;
            transform: translateY(24px);
            animation: fadeInUp 0.6s ease forwards;
        }

        @keyframes fadeInUp {
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }

        .fade-in-up:nth-child(2) {
            animation-delay: 0.1s;
        }
        .fade-in-up:nth-child(3) {
            animation-delay: 0.2s;
        }
        .fade-in-up:nth-child(4) {
            animation-delay: 0.3s;
        }

        .hover-lift {
            transition: var(--transition);
        }
        .hover-lift:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-hover);
        }

.faq-question i.rotate-180 {
            transform: rotate(180deg);
        }
        .faq-question i {
            transition: transform 0.3s ease;
        }

/* roulang page: category1 */
:root {
            --primary: #2563eb;
            --primary-dark: #1d4ed8;
            --primary-light: #3b82f6;
            --primary-bg: #eff6ff;
            --accent: #f59e0b;
            --accent-dark: #d97706;
            --accent-light: #fbbf24;
            --bg: #ffffff;
            --bg-alt: #f8fafc;
            --bg-card: #ffffff;
            --text: #0f172a;
            --text-secondary: #475569;
            --text-weak: #94a3b8;
            --border: #e2e8f0;
            --border-light: #f1f5f9;
            --radius: 12px;
            --radius-sm: 8px;
            --radius-lg: 16px;
            --shadow: 0 1px 3px rgba(0,0,0,0.06), 0 1px 2px rgba(0,0,0,0.04);
            --shadow-md: 0 4px 6px -1px rgba(0,0,0,0.07), 0 2px 4px -1px rgba(0,0,0,0.04);
            --shadow-lg: 0 10px 25px -3px rgba(0,0,0,0.08), 0 4px 6px -2px rgba(0,0,0,0.04);
            --shadow-xl: 0 20px 40px -5px rgba(0,0,0,0.1);
            --transition: all 0.25s cubic-bezier(0.4,0,0.2,1);
            --font-sans: 'Inter', system-ui, -apple-system, 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif;
        }
        *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
        html { scroll-behavior: smooth; -webkit-font-smoothing: antialiased; -moz-osx-font-smoothing: grayscale; }
        body { font-family: var(--font-sans); background: var(--bg); color: var(--text); line-height: 1.7; font-size: 16px; }
        a { color: inherit; text-decoration: none; transition: var(--transition); }
        img { max-width: 100%; height: auto; display: block; }
        button, input, select, textarea { font-family: inherit; font-size: inherit; }
        button { cursor: pointer; border: none; background: none; }
        ul, ol { list-style: none; }
        .container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }
        @media (max-width: 768px) { .container { padding: 0 16px; } }
        @media (max-width: 480px) { .container { padding: 0 12px; } }

        /* Header */
        .header-main { background: rgba(255,255,255,0.92); backdrop-filter: blur(16px); -webkit-backdrop-filter: blur(16px); border-bottom: 1px solid var(--border); position: sticky; top: 0; z-index: 100; }
        .header-inner { display: flex; align-items: center; justify-content: space-between; height: 68px; gap: 24px; }
        .logo-link { display: flex; align-items: center; gap: 10px; font-weight: 700; font-size: 1.25rem; color: var(--text); transition: var(--transition); }
        .logo-link:hover { opacity: 0.82; }
        .logo-icon { display: inline-flex; align-items: center; justify-content: center; width: 36px; height: 36px; background: linear-gradient(135deg, var(--primary), var(--primary-dark)); color: #fff; border-radius: var(--radius-sm); font-size: 1.125rem; font-weight: 800; }
        .nav-desktop { display: flex; align-items: center; gap: 8px; }
        .nav-desktop a { padding: 8px 16px; border-radius: var(--radius-sm); font-size: 0.9375rem; font-weight: 500; color: var(--text-secondary); transition: var(--transition); white-space: nowrap; }
        .nav-desktop a:hover { color: var(--primary); background: var(--primary-bg); }
        .nav-desktop a.active { color: var(--primary); background: var(--primary-bg); font-weight: 600; }
        .nav-cta { display: inline-flex; align-items: center; gap: 8px; background: linear-gradient(135deg, var(--primary), var(--primary-dark)) !important; color: #fff !important; padding: 8px 20px !important; border-radius: var(--radius-sm) !important; font-weight: 600 !important; box-shadow: 0 2px 8px rgba(37,99,235,0.25); }
        .nav-cta:hover { transform: translateY(-1px); box-shadow: 0 4px 14px rgba(37,99,235,0.35) !important; color: #fff !important; background: linear-gradient(135deg, var(--primary-dark), #1e40af) !important; }
        .mobile-menu-btn { display: none; background: none; border: none; padding: 8px; color: var(--text); font-size: 1.5rem; cursor: pointer; }
        .mobile-nav { display: none; }
        @media (max-width: 768px) {
            .nav-desktop { display: none; }
            .mobile-menu-btn { display: flex; align-items: center; justify-content: center; }
            .mobile-nav.open { display: flex; flex-direction: column; background: #fff; border-top: 1px solid var(--border); padding: 8px 16px 16px; gap: 4px; box-shadow: var(--shadow-lg); }
            .mobile-nav a { display: flex; align-items: center; padding: 12px 16px; border-radius: var(--radius-sm); font-weight: 500; color: var(--text-secondary); transition: var(--transition); }
            .mobile-nav a:hover { background: var(--primary-bg); color: var(--primary); }
            .mobile-nav a.active { background: var(--primary-bg); color: var(--primary); font-weight: 600; }
            .mobile-nav .nav-cta { margin-top: 8px; justify-content: center; color: #fff !important; background: linear-gradient(135deg, var(--primary), var(--primary-dark)); }
            .mobile-nav .nav-cta:hover { background: linear-gradient(135deg, var(--primary-dark), #1e40af); color: #fff !important; }
        }
        @media (max-width: 480px) {
            .header-inner { height: 60px; }
            .logo-link { font-size: 1.1rem; }
            .logo-icon { width: 32px; height: 32px; font-size: 1rem; }
        }

        /* Footer */
        .footer-main { background: #0f172a; color: #cbd5e1; padding: 60px 0 0; margin-top: 80px; }
        .footer-grid { display: grid; grid-template-columns: 1.6fr 1fr 1fr; gap: 48px; padding-bottom: 40px; border-bottom: 1px solid rgba(255,255,255,0.08); }
        .footer-brand p { margin-top: 16px; font-size: 0.9375rem; line-height: 1.7; color: #94a3b8; max-width: 420px; }
        .footer-links h4 { color: #f1f5f9; font-size: 0.9375rem; font-weight: 600; margin-bottom: 18px; letter-spacing: 0.02em; }
        .footer-links ul { display: flex; flex-direction: column; gap: 10px; }
        .footer-links a { color: #94a3b8; font-size: 0.9rem; transition: var(--transition); }
        .footer-links a:hover { color: #fff; }
        .footer-bottom { display: flex; flex-direction: column; align-items: center; gap: 6px; padding: 24px 0; text-align: center; font-size: 0.85rem; color: #64748b; }
        .footer-bottom span:first-child { font-weight: 500; }
        @media (max-width: 768px) {
            .footer-grid { grid-template-columns: 1fr; gap: 32px; }
            .footer-brand p { max-width: 100%; }
            .footer-bottom { flex-direction: column; gap: 4px; }
        }
        @media (max-width: 480px) {
            .footer-main { padding: 40px 0 0; margin-top: 48px; }
            .footer-grid { gap: 24px; }
        }

        /* Page Hero */
        .page-hero { padding: 64px 0 56px; background: linear-gradient(135deg, #eff6ff 0%, #f8fafc 100%); position: relative; overflow: hidden; }
        .page-hero::after { content: ''; position: absolute; top: -40%; right: -20%; width: 500px; height: 500px; background: radial-gradient(circle, rgba(37,99,235,0.06) 0%, transparent 70%); border-radius: 50%; pointer-events: none; }
        .page-hero .container { position: relative; z-index: 1; }
        .page-hero h1 { font-size: 2.5rem; font-weight: 800; color: var(--text); line-height: 1.2; letter-spacing: -0.02em; }
        .page-hero h1 span { background: linear-gradient(135deg, var(--primary), var(--primary-dark)); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
        .page-hero p { font-size: 1.1rem; color: var(--text-secondary); max-width: 680px; margin-top: 16px; line-height: 1.7; }
        .page-hero .breadcrumb { display: flex; align-items: center; gap: 8px; font-size: 0.875rem; color: var(--text-weak); margin-bottom: 20px; }
        .page-hero .breadcrumb a { color: var(--primary); font-weight: 500; }
        .page-hero .breadcrumb a:hover { text-decoration: underline; }
        .page-hero .breadcrumb i { font-size: 0.7rem; color: var(--text-weak); }
        @media (max-width: 768px) {
            .page-hero { padding: 40px 0 36px; }
            .page-hero h1 { font-size: 1.75rem; }
            .page-hero p { font-size: 1rem; }
        }
        @media (max-width: 480px) {
            .page-hero h1 { font-size: 1.5rem; }
        }

        /* Section */
        .section { padding: 64px 0; }
        .section-alt { background: var(--bg-alt); }
        .section-title { text-align: center; margin-bottom: 48px; }
        .section-title h2 { font-size: 2rem; font-weight: 700; color: var(--text); letter-spacing: -0.01em; }
        .section-title h2 span { color: var(--primary); }
        .section-title p { color: var(--text-secondary); max-width: 600px; margin: 12px auto 0; font-size: 1.05rem; }
        @media (max-width: 768px) {
            .section { padding: 48px 0; }
            .section-title { margin-bottom: 32px; }
            .section-title h2 { font-size: 1.5rem; }
            .section-title p { font-size: 0.95rem; }
        }
        @media (max-width: 480px) {
            .section { padding: 36px 0; }
            .section-title h2 { font-size: 1.35rem; }
        }

        /* Steps */
        .steps-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; counter-reset: step; }
        .step-card { background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius); padding: 28px 24px; transition: var(--transition); position: relative; }
        .step-card:hover { box-shadow: var(--shadow-lg); transform: translateY(-4px); border-color: var(--primary-light); }
        .step-card .step-num { display: inline-flex; align-items: center; justify-content: center; width: 44px; height: 44px; border-radius: 50%; background: var(--primary-bg); color: var(--primary); font-weight: 700; font-size: 1.125rem; margin-bottom: 16px; }
        .step-card h3 { font-size: 1.1rem; font-weight: 600; margin-bottom: 8px; color: var(--text); }
        .step-card p { font-size: 0.9rem; color: var(--text-secondary); line-height: 1.6; }
        @media (max-width: 1024px) {
            .steps-grid { grid-template-columns: repeat(2, 1fr); }
        }
        @media (max-width: 560px) {
            .steps-grid { grid-template-columns: 1fr; }
        }

        /* Feature Cards */
        .feature-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
        .feature-card { background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius); padding: 32px 28px; transition: var(--transition); }
        .feature-card:hover { box-shadow: var(--shadow-lg); transform: translateY(-4px); border-color: var(--primary-light); }
        .feature-card .icon-wrap { display: inline-flex; align-items: center; justify-content: center; width: 52px; height: 52px; border-radius: var(--radius-sm); background: var(--primary-bg); color: var(--primary); font-size: 1.35rem; margin-bottom: 18px; transition: var(--transition); }
        .feature-card:hover .icon-wrap { background: var(--primary); color: #fff; }
        .feature-card h3 { font-size: 1.1rem; font-weight: 600; margin-bottom: 10px; color: var(--text); }
        .feature-card p { font-size: 0.9rem; color: var(--text-secondary); line-height: 1.65; }
        .feature-card .tag { display: inline-block; margin-top: 14px; padding: 4px 12px; border-radius: 20px; font-size: 0.8rem; font-weight: 500; background: var(--primary-bg); color: var(--primary); }
        @media (max-width: 1024px) {
            .feature-grid { grid-template-columns: repeat(2, 1fr); }
        }
        @media (max-width: 560px) {
            .feature-grid { grid-template-columns: 1fr; }
        }

        /* Safety Tips */
        .tips-list { max-width: 800px; margin: 0 auto; display: flex; flex-direction: column; gap: 16px; }
        .tip-item { display: flex; align-items: flex-start; gap: 16px; background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius); padding: 20px 24px; transition: var(--transition); }
        .tip-item:hover { box-shadow: var(--shadow-md); border-color: var(--accent-light); }
        .tip-item .tip-icon { flex-shrink: 0; width: 40px; height: 40px; border-radius: 50%; display: flex; align-items: center; justify-content: center; font-size: 1rem; }
        .tip-item .tip-icon.success { background: #ecfdf5; color: #10b981; }
        .tip-item .tip-icon.warning { background: #fffbeb; color: #f59e0b; }
        .tip-item .tip-icon.info { background: #eff6ff; color: #3b82f6; }
        .tip-item h4 { font-size: 1rem; font-weight: 600; color: var(--text); margin-bottom: 4px; }
        .tip-item p { font-size: 0.9rem; color: var(--text-secondary); line-height: 1.6; }
        @media (max-width: 560px) {
            .tip-item { padding: 16px; flex-direction: column; }
            .tip-item .tip-icon { width: 36px; height: 36px; font-size: 0.9rem; }
        }

        /* FAQ */
        .faq-list { max-width: 800px; margin: 0 auto; display: flex; flex-direction: column; gap: 12px; }
        .faq-item { background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius); overflow: hidden; transition: var(--transition); }
        .faq-item:hover { border-color: var(--primary-light); }
        .faq-question { display: flex; align-items: center; justify-content: space-between; padding: 20px 24px; cursor: pointer; font-weight: 600; font-size: 1rem; color: var(--text); transition: var(--transition); user-select: none; }
        .faq-question:hover { background: var(--bg-alt); }
        .faq-question i { font-size: 0.85rem; color: var(--text-weak); transition: var(--transition); }
        .faq-item.active .faq-question i { transform: rotate(180deg); color: var(--primary); }
        .faq-answer { padding: 0 24px 20px; font-size: 0.9375rem; color: var(--text-secondary); line-height: 1.7; display: none; }
        .faq-item.active .faq-answer { display: block; }
        @media (max-width: 560px) {
            .faq-question { padding: 16px 18px; font-size: 0.9375rem; }
            .faq-answer { padding: 0 18px 16px; font-size: 0.9rem; }
        }

        /* CTA */
        .cta-block { background: linear-gradient(135deg, #1e40af 0%, #3b82f6 100%); border-radius: var(--radius-lg); padding: 56px 48px; text-align: center; color: #fff; position: relative; overflow: hidden; }
        .cta-block::before { content: ''; position: absolute; top: -50%; right: -30%; width: 400px; height: 400px; background: radial-gradient(circle, rgba(255,255,255,0.08) 0%, transparent 70%); border-radius: 50%; pointer-events: none; }
        .cta-block h2 { font-size: 2rem; font-weight: 700; position: relative; z-index: 1; }
        .cta-block p { font-size: 1.1rem; opacity: 0.9; max-width: 600px; margin: 14px auto 28px; position: relative; z-index: 1; line-height: 1.6; }
        .cta-block .btn-cta { display: inline-flex; align-items: center; gap: 10px; background: #fff; color: var(--primary-dark); padding: 14px 36px; border-radius: var(--radius-sm); font-weight: 700; font-size: 1.05rem; transition: var(--transition); box-shadow: 0 4px 14px rgba(0,0,0,0.15); position: relative; z-index: 1; }
        .cta-block .btn-cta:hover { transform: translateY(-2px); box-shadow: 0 8px 24px rgba(0,0,0,0.2); background: #f8fafc; }
        @media (max-width: 768px) {
            .cta-block { padding: 40px 24px; }
            .cta-block h2 { font-size: 1.5rem; }
            .cta-block p { font-size: 1rem; }
            .cta-block .btn-cta { padding: 12px 28px; font-size: 1rem; }
        }
        @media (max-width: 480px) {
            .cta-block { padding: 32px 18px; }
            .cta-block h2 { font-size: 1.35rem; }
        }

        /* Quick Links */
        .quick-links { display: flex; flex-wrap: wrap; gap: 12px; justify-content: center; margin-top: 24px; }
        .quick-link { display: inline-flex; align-items: center; gap: 8px; padding: 10px 22px; border-radius: var(--radius-sm); background: var(--bg-card); border: 1px solid var(--border); color: var(--text-secondary); font-weight: 500; font-size: 0.9rem; transition: var(--transition); }
        .quick-link:hover { border-color: var(--primary-light); color: var(--primary); box-shadow: var(--shadow-md); transform: translateY(-2px); }
        .quick-link i { color: var(--primary); font-size: 0.85rem; }

        /* Back to top */
        .back-top { position: fixed; bottom: 32px; right: 32px; width: 44px; height: 44px; border-radius: 50%; background: var(--primary); color: #fff; display: flex; align-items: center; justify-content: center; font-size: 1.1rem; box-shadow: var(--shadow-lg); transition: var(--transition); opacity: 0; visibility: hidden; z-index: 50; border: none; cursor: pointer; }
        .back-top.visible { opacity: 1; visibility: visible; }
        .back-top:hover { background: var(--primary-dark); transform: translateY(-3px); box-shadow: var(--shadow-xl); }
        @media (max-width: 560px) {
            .back-top { bottom: 20px; right: 20px; width: 40px; height: 40px; font-size: 1rem; }
        }

        /* Animations */
        .fade-up { opacity: 0; transform: translateY(20px); transition: opacity 0.6s ease, transform 0.6s ease; }
        .fade-up.visible { opacity: 1; transform: translateY(0); }

/* roulang page: article */
:root {
            --primary: #1a56db;
            --primary-dark: #1243af;
            --primary-light: #e8f0fe;
            --accent: #f59e0b;
            --accent-dark: #d97706;
            --bg-body: #f8fafc;
            --bg-card: #ffffff;
            --bg-dark: #0f172a;
            --bg-dark-secondary: #1e293b;
            --text-primary: #0f172a;
            --text-secondary: #475569;
            --text-light: #94a3b8;
            --text-white: #f1f5f9;
            --border: #e2e8f0;
            --border-light: #f1f5f9;
            --radius: 12px;
            --radius-sm: 8px;
            --radius-lg: 20px;
            --shadow-sm: 0 1px 3px rgba(0,0,0,0.06), 0 1px 2px rgba(0,0,0,0.04);
            --shadow: 0 4px 12px rgba(0,0,0,0.08);
            --shadow-lg: 0 12px 40px rgba(0,0,0,0.12);
            --shadow-xl: 0 20px 60px rgba(0,0,0,0.18);
            --font-sans: 'Inter', system-ui, -apple-system, 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif;
            --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
        }

        *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
        html { scroll-behavior: smooth; -webkit-font-smoothing: antialiased; -moz-osx-font-smoothing: grayscale; }
        body {
            font-family: var(--font-sans);
            background: var(--bg-body);
            color: var(--text-primary);
            line-height: 1.7;
            font-size: 16px;
        }
        img { max-width: 100%; height: auto; display: block; border-radius: var(--radius-sm); }
        a { color: var(--primary); text-decoration: none; transition: color var(--transition); }
        a:hover { color: var(--primary-dark); }
        a:focus-visible { outline: 2px solid var(--primary); outline-offset: 2px; border-radius: 4px; }
        button, input, textarea, select { font-family: inherit; font-size: inherit; }
        button { cursor: pointer; border: none; background: none; }
        ul, ol { list-style: none; }
        h1, h2, h3, h4, h5, h6 { line-height: 1.3; font-weight: 700; color: var(--text-primary); }

        .container { width: 100%; max-width: 1200px; margin: 0 auto; padding: 0 24px; }
        @media (min-width: 768px) { .container { padding: 0 40px; } }
        @media (min-width: 1024px) { .container { padding: 0 60px; } }

        .header-main {
            background: rgba(255,255,255,0.92);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid var(--border);
            position: sticky;
            top: 0;
            z-index: 100;
            transition: box-shadow var(--transition);
        }
        .header-main.scrolled { box-shadow: var(--shadow); }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 68px;
        }
        .logo-link {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 22px;
            font-weight: 800;
            color: var(--text-primary);
            letter-spacing: -0.5px;
        }
        .logo-link:hover { color: var(--primary); }
        .logo-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            color: #fff;
            border-radius: var(--radius-sm);
            font-size: 20px;
            font-weight: 700;
            box-shadow: 0 4px 12px rgba(26,86,219,0.3);
        }
        .nav-desktop { display: flex; align-items: center; gap: 32px; }
        .nav-desktop a {
            font-size: 15px;
            font-weight: 500;
            color: var(--text-secondary);
            padding: 6px 0;
            position: relative;
            transition: color var(--transition);
        }
        .nav-desktop a::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 0;
            height: 2.5px;
            background: var(--primary);
            border-radius: 4px;
            transition: width var(--transition);
        }
        .nav-desktop a:hover { color: var(--primary); }
        .nav-desktop a:hover::after { width: 100%; }
        .nav-desktop a.active { color: var(--primary); }
        .nav-desktop a.active::after { width: 100%; }
        .nav-desktop a.nav-cta {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            color: #fff !important;
            padding: 10px 24px;
            border-radius: 50px;
            font-weight: 600;
            font-size: 14px;
            box-shadow: 0 4px 14px rgba(26,86,219,0.3);
            transition: all var(--transition);
        }
        .nav-desktop a.nav-cta::after { display: none; }
        .nav-desktop a.nav-cta:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(26,86,219,0.4);
            background: linear-gradient(135deg, var(--primary-dark), #0d3b9e);
        }

        .mobile-bottom-tab {
            display: none;
            position: fixed;
            bottom: 0;
            left: 0;
            width: 100%;
            background: rgba(255,255,255,0.96);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            border-top: 1px solid var(--border);
            z-index: 200;
            padding: 6px 0 env(safe-area-inset-bottom, 6px) 0;
            box-shadow: 0 -4px 20px rgba(0,0,0,0.06);
        }
        .mobile-tab-inner { display: flex; align-items: center; justify-content: space-around; }
        .mobile-tab-item {
            display: flex;
            flex-direction: column;
            align-items: center;
            gap: 2px;
            padding: 6px 12px;
            font-size: 11px;
            color: var(--text-light);
            transition: color var(--transition);
            border-radius: var(--radius-sm);
        }
        .mobile-tab-item i { font-size: 20px; transition: transform var(--transition); }
        .mobile-tab-item:hover { color: var(--primary); }
        .mobile-tab-item:hover i { transform: translateY(-2px); }
        .mobile-tab-item.active { color: var(--primary); }
        .mobile-tab-item.active i { color: var(--primary); }
        .mobile-tab-item .tab-label { font-weight: 500; font-size: 10px; }
        .mobile-tab-cta {
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            color: #fff !important;
            padding: 8px 18px;
            border-radius: 50px;
            font-weight: 600;
            font-size: 12px;
            box-shadow: 0 4px 12px rgba(26,86,219,0.3);
        }
        .mobile-tab-cta i { font-size: 16px; }
        .mobile-tab-cta:hover { transform: translateY(-2px); box-shadow: 0 6px 20px rgba(26,86,219,0.4); }

        @media (max-width: 767px) {
            .nav-desktop { display: none; }
            .mobile-bottom-tab { display: block; }
            body { padding-bottom: 72px; }
            .header-inner { height: 60px; }
            .logo-link { font-size: 18px; }
            .logo-icon { width: 34px; height: 34px; font-size: 16px; }
        }

        .page-breadcrumb {
            padding: 20px 0 0;
            font-size: 14px;
            color: var(--text-light);
            display: flex;
            flex-wrap: wrap;
            gap: 6px;
            align-items: center;
        }
        .page-breadcrumb a { color: var(--text-light); }
        .page-breadcrumb a:hover { color: var(--primary); }
        .page-breadcrumb .sep { color: var(--border); margin: 0 4px; }
        .page-breadcrumb .current { color: var(--text-secondary); font-weight: 500; }

        .article-wrapper {
            background: var(--bg-card);
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-sm);
            padding: 40px 48px;
            margin: 24px 0 48px;
            border: 1px solid var(--border-light);
        }
        .article-header { margin-bottom: 32px; padding-bottom: 24px; border-bottom: 1px solid var(--border); }
        .article-title {
            font-size: 32px;
            font-weight: 800;
            line-height: 1.25;
            letter-spacing: -0.5px;
            margin-bottom: 16px;
            color: var(--text-primary);
        }
        .article-meta {
            display: flex;
            flex-wrap: wrap;
            gap: 16px 24px;
            align-items: center;
            font-size: 14px;
            color: var(--text-secondary);
        }
        .article-meta .meta-item {
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .article-meta .meta-item i { color: var(--text-light); font-size: 14px; }
        .article-meta .category-badge {
            display: inline-block;
            padding: 4px 14px;
            background: var(--primary-light);
            color: var(--primary);
            border-radius: 50px;
            font-size: 13px;
            font-weight: 600;
        }
        .article-content {
            font-size: 16.5px;
            line-height: 1.85;
            color: var(--text-secondary);
        }
        .article-content p { margin-bottom: 1.4em; }
        .article-content h2, .article-content h3 { margin-top: 1.8em; margin-bottom: 0.6em; color: var(--text-primary); }
        .article-content h2 { font-size: 24px; }
        .article-content h3 { font-size: 20px; }
        .article-content ul, .article-content ol { margin-bottom: 1.4em; padding-left: 24px; }
        .article-content ul { list-style: disc; }
        .article-content ol { list-style: decimal; }
        .article-content li { margin-bottom: 0.4em; }
        .article-content a { color: var(--primary); text-decoration: underline; text-underline-offset: 2px; }
        .article-content a:hover { color: var(--primary-dark); }
        .article-content blockquote {
            border-left: 4px solid var(--primary);
            background: var(--primary-light);
            padding: 16px 24px;
            margin: 1.6em 0;
            border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
            font-style: italic;
            color: var(--text-secondary);
        }
        .article-content img { margin: 1.6em auto; border-radius: var(--radius); box-shadow: var(--shadow-sm); }
        .article-content code {
            background: #f1f5f9;
            padding: 2px 8px;
            border-radius: 4px;
            font-size: 0.9em;
            color: #e11d48;
        }
        .article-content pre {
            background: #0f172a;
            color: #e2e8f0;
            padding: 20px 24px;
            border-radius: var(--radius);
            overflow-x: auto;
            margin: 1.6em 0;
            font-size: 14px;
            line-height: 1.6;
        }
        .article-content pre code { background: none; color: inherit; padding: 0; }
        .article-footer-bar {
            margin-top: 32px;
            padding-top: 24px;
            border-top: 1px solid var(--border);
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            align-items: center;
            gap: 16px;
        }
        .article-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
        }
        .article-tags .tag {
            padding: 4px 14px;
            background: #f1f5f9;
            border-radius: 50px;
            font-size: 13px;
            color: var(--text-secondary);
            transition: all var(--transition);
        }
        .article-tags .tag:hover { background: var(--primary-light); color: var(--primary); }
        .article-share {
            display: flex;
            align-items: center;
            gap: 12px;
            font-size: 14px;
            color: var(--text-light);
        }
        .article-share a {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 36px;
            height: 36px;
            border-radius: 50%;
            background: #f1f5f9;
            color: var(--text-secondary);
            transition: all var(--transition);
            font-size: 16px;
        }
        .article-share a:hover { background: var(--primary); color: #fff; transform: translateY(-2px); }

        .not-found-block {
            text-align: center;
            padding: 80px 24px;
        }
        .not-found-block .nf-icon {
            font-size: 64px;
            color: var(--text-light);
            margin-bottom: 20px;
        }
        .not-found-block h1 { font-size: 28px; margin-bottom: 12px; }
        .not-found-block p { color: var(--text-secondary); margin-bottom: 24px; font-size: 16px; }
        .not-found-block .btn-back {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 32px;
            background: var(--primary);
            color: #fff;
            border-radius: 50px;
            font-weight: 600;
            transition: all var(--transition);
        }
        .not-found-block .btn-back:hover { background: var(--primary-dark); transform: translateY(-2px); box-shadow: var(--shadow); }

        .related-section { padding: 48px 0; }
        .related-grid {
            display: grid;
            grid-template-columns: repeat(1, 1fr);
            gap: 24px;
        }
        @media (min-width: 640px) { .related-grid { grid-template-columns: repeat(2, 1fr); } }
        @media (min-width: 1024px) { .related-grid { grid-template-columns: repeat(3, 1fr); } }
        .related-card {
            background: var(--bg-card);
            border-radius: var(--radius);
            border: 1px solid var(--border);
            padding: 24px;
            transition: all var(--transition);
            box-shadow: var(--shadow-sm);
        }
        .related-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-lg);
            border-color: var(--primary-light);
        }
        .related-card .rc-cat {
            font-size: 12px;
            font-weight: 600;
            color: var(--primary);
            text-transform: uppercase;
            letter-spacing: 0.5px;
            margin-bottom: 8px;
        }
        .related-card h3 { font-size: 17px; font-weight: 700; margin-bottom: 8px; line-height: 1.4; }
        .related-card h3 a { color: var(--text-primary); }
        .related-card h3 a:hover { color: var(--primary); }
        .related-card p { font-size: 14px; color: var(--text-secondary); margin-bottom: 12px; line-height: 1.6; }
        .related-card .rc-meta { font-size: 13px; color: var(--text-light); display: flex; gap: 16px; }

        .cta-section {
            background: linear-gradient(135deg, #0f172a 0%, #1e293b 100%);
            border-radius: var(--radius-lg);
            padding: 56px 48px;
            margin: 48px 0;
            text-align: center;
            position: relative;
            overflow: hidden;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            top: -50%;
            right: -30%;
            width: 500px;
            height: 500px;
            background: radial-gradient(circle, rgba(26,86,219,0.15) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }
        .cta-section h2 { color: #fff; font-size: 30px; margin-bottom: 12px; position: relative; }
        .cta-section p { color: #94a3b8; font-size: 16px; max-width: 600px; margin: 0 auto 28px; position: relative; }
        .cta-section .btn-cta {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 14px 40px;
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            color: #fff;
            border-radius: 50px;
            font-weight: 700;
            font-size: 16px;
            box-shadow: 0 8px 24px rgba(26,86,219,0.35);
            transition: all var(--transition);
            position: relative;
        }
        .cta-section .btn-cta:hover {
            transform: translateY(-3px);
            box-shadow: 0 12px 36px rgba(26,86,219,0.45);
            background: linear-gradient(135deg, var(--primary-dark), #0d3b9e);
        }

        .footer-main {
            background: var(--bg-dark);
            color: #94a3b8;
            padding: 60px 0 32px;
            margin-top: 48px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1fr;
            gap: 36px;
        }
        @media (min-width: 640px) { .footer-grid { grid-template-columns: 2fr 1fr 1fr; } }
        .footer-brand p { margin-top: 12px; font-size: 14px; line-height: 1.7; max-width: 360px; color: #64748b; }
        .footer-links h4 { color: #f1f5f9; font-size: 15px; font-weight: 600; margin-bottom: 16px; }
        .footer-links ul li { margin-bottom: 10px; }
        .footer-links ul li a { color: #64748b; font-size: 14px; transition: color var(--transition); }
        .footer-links ul li a:hover { color: #f1f5f9; }
        .footer-bottom {
            margin-top: 40px;
            padding-top: 24px;
            border-top: 1px solid #1e293b;
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            gap: 12px;
            font-size: 13px;
            color: #475569;
        }
        .footer-bottom span { line-height: 1.6; }

        @media (max-width: 767px) {
            .article-wrapper { padding: 24px 20px; margin: 16px 0 32px; }
            .article-title { font-size: 24px; }
            .article-content { font-size: 15px; }
            .cta-section { padding: 36px 24px; }
            .cta-section h2 { font-size: 24px; }
            .page-breadcrumb { font-size: 13px; padding: 16px 0 0; }
            .related-card { padding: 18px; }
            .footer-main { padding: 40px 0 24px; }
            .footer-grid { gap: 24px; }
        }

        @media (min-width: 768px) and (max-width: 1023px) {
            .article-wrapper { padding: 32px 36px; }
            .article-title { font-size: 28px; }
        }

        @media (min-width: 1024px) {
            .article-wrapper { padding: 48px 56px; }
        }

        .animate-fade-in { animation: fadeIn 0.6s ease-out both; }
        @keyframes fadeIn { from { opacity: 0; transform: translateY(12px); } to { opacity: 1; transform: translateY(0); } }

        .section-title {
            font-size: 28px;
            font-weight: 800;
            margin-bottom: 8px;
            letter-spacing: -0.3px;
            color: var(--text-primary);
        }
        .section-subtitle {
            font-size: 16px;
            color: var(--text-secondary);
            margin-bottom: 32px;
            max-width: 600px;
        }
        .text-center { text-align: center; }
        .mx-auto { margin-left: auto; margin-right: auto; }

        @media (max-width: 640px) {
            .section-title { font-size: 22px; }
            .section-subtitle { font-size: 14px; }
        }